The Mast itself is fenced off and normally has a guard. The fenced area is restricted.
A testing climb up to one of the highest Radio Masts in the area, it starts with a section of good jeep track, but quickly turns into a McDonald's ball pit of loose stones at the bottom of the climb. Balance and power are all important to keep from having to put a foot down.
Once you make it though the stones, the jeep track turns into a concrete strip road of varying degrees of degradation. You'll need to change sides a few times on the way up and try to remember where some of the larger holes are located so that you can avoid them when you come screaming down the hill again.